Dell Products Inc.

Emc IP Holding Company LLC

Roi Tagar

Rivka Mayraz Matosevich

Dan Aharoni

Aharon Blitzer

Zeev Shusterman

Ziv Dor

Evgeny Katz

Yuval Peleg Lieblich

Gil Ben Zeev

Amir Aloosh

Eyal Brami

Gil BenZeev

Techniques are provided for processing of input/output (I/O) operations within a fault domain of a data storage system. One method comprises receiving I/O write requests from a client application, executing in a first fault domain, to write data; writing, by the storage control system, a primary copy of the data of the I/O write requests to at least one storage volume in the first fault domain using a designated assignment of the client application to the first fault domain; and writing a secondary copy of the data of the I/O write requests to at least one storage volume in an additional fault domain, wherein data responsive to I/O read requests from the client application executing in the first fault domain is obtained from the at least one storage volume in the first fault domain.

Processing of input/output operations within a fault domain of a data storage system

Techniques are provided for implementing storage block balancing using volume part migration. One method comprises obtaining a capacity utilization of storage blocks each storing a portion of one or more storage volumes; and when the capacity utilization of a given storage block is above an upper target threshold, migrating a volume part of the given storage block to a different storage block having a capacity utilization below a lower target threshold, wherein the different storage block is within a same storage pool as the given storage block, and wherein the volume part comprises a subset of a storage volume. A volume part from a first storage block may also (or alternatively) be migrated to a second storage block when: (i) a number of blocks exceed a first threshold; (ii) a plurality of volume parts of the first storage block fit in one or more additional storage blocks in the same storage pool that are below the lower target threshold; and/or (iii) a storage block having a lowest utilization in the storage pool is smaller than a second threshold.

Storage block balancing using volume part migration

Techniques are provided for generating host connectivity plans with load balancing and resiliency. One method comprises obtaining a number of storage system target ports needed for a given host; identifying available target ports in the storage system and an input-output (IO) target component associated with each available target port; and calculating the host connectivity plan until the host connectivity plan includes the obtained number of target ports by: (i) selecting at least one IO target component not already in the host connectivity plan that satisfies a resiliency policy and/or a load balancing policy; (ii) selecting at least one target port associated with the selected at least one IO target component and (iii) adding the selected at least one target port to the host connectivity plan. The resiliency policy may require connectivity without a single point of failure. The load balancing policy may specify that the IO target components serve a substantially equal IO load.

Generation of host connectivity plans with load balancing and resiliency

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Haifa, Israel

Roi Tagar